Muscle Omohyoid

Scapula muscle - subrotor

A muscle consisting of a pair of external and internal subrotators, or the trapezius muscle, their processes reach the clavicle, and at the angle of the scapula the free end of the processes from the root of the scapula is directed downward. The length of the muscle is 5-13 cm, thickness 0.5-2.2 cm. The anterior part of the muscle lies on the surface of the upper surface of the clavicle-scapula, the rear part has the appearance of a large triangular tendon plate medial to the posterior edge of the scapula. The outer group of the subrotator includes the lateral and medial subrotators, the superficial fibers of the inner group include the internal and external subrotators, and the deep fibers include the deep external and internal subrotators.

The anterior surface of the sub-rot. medially and along the longitudinal axis of the scapula it thickens, forming a thickened eminence - rougher than the fascia. The base of the erection at the internal subrotatra goes around the coracoid process of the scapula, which is partially covered by fascia. The medial elevation of the anterior surface along the posterior edge of the scapula is adjacent to the superficial fascia, from which the capsule is widely separated by a strip of sheaths for the small shoulder joint. The inner edge of the scapula (r) enters the vagina at the place of the bony bend of the scapula. The base of the lateral eminence, with a narrow plate, extends over the coracoid process. The stretched strip of fascia formed by this plate runs along the bone erection and takes part in the formation of the lumbar fascia above the elevation of the shoulder girdle.

From behind, outwards, a trapezoidal facies runs along the lower surface of the scapula. In the corner of the scapula and along the lower corners of the anterior end of the clavicle, the facies is attached to the clavicle. When the facies, together with the trapezium, is covered behind the scapula by a muscular suture, the facies passes downward into the interscapular facies, which covers the dorsal chest muscles. The capsule of the shoulder joint is supported posteriorly by the long tendon of the long head of the triceps muscle (part of it), running from the coracoid process along the anterior end of the coracoclavicular facies. On the medial side of the shoulder seam there is a subscapularis m., which abducts the shoulder down and laterally.

Along the upper edge of the ulnar tubercle lies the subscapularis; along the anterior and posterior edges of the scapula, connecting with each other, it is woven into the capsule of the humerus and secures it to the surface of the scapula. The faina from the subscapularis is absent or poorly developed. Above the subscapularis and behind the subscapularis facies lies the facia muscle, starting from the posterior and lateral surface of the humerus.